Alert archive / Texas / Mesoscale Discussions in 2012
Mesoscale Discussion 1894
The Storm Prediction Center issued this mesoscale discussion at Sep 5, 2012, 2:49 PM CDT for 13 counties in Oklahoma; 20 counties in Texas. It was in force for 56 min.
The area
The outline as issued.
The facts
- Issued
- Sep 5, 2012, 2:49 PM CDT (19:49 UTC)
- Expired
- Sep 5, 2012, 3:45 PM CDT
- In force
- 56 min
- Issued by
- the Storm Prediction Center
- Chance of a watch
- 60%
All 33 counties
Beckham County, OK, Custer County, OK, Dewey County, OK, Ellis County, OK, Greer County, OK, Harmon County, OK, Harper County, OK, Jackson County, OK, Major County, OK, Roger Mills County, OK, Washita County, OK, Woods County, OK, Woodward County, OK, Armstrong County, TX, Briscoe County, TX, Carson County, TX, Childress County, TX, Collingsworth County, TX, Cottle County, TX, Donley County, TX, Gray County, TX, Hall County, TX, Hardeman County, TX, Hemphill County, TX, Hutchinson County, TX, Lipscomb County, TX, Motley County, TX, Ochiltree County, TX, Potter County, TX, Randall County, TX, Roberts County, TX, Swisher County, TX, Wheeler County, TX
The radar
The Amarillo radar (KAMA), 124 km from the middle of the area, began a volume at 19:50 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Amarillo Airport, TX (KAMA), launched 12:00Z, 7.8 hours before the alert went out and 123 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1415 J/kg
- Mixed-layer CIN
- -182 J/kg
- Mixed-layer LCL
- 1651 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 49 m²/s²
- 0-3 km storm-relative helicity
- 66 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 5, 3:19 PM CDT | Severe Thunderstorm Watch | SPC | Beaver, Texas | 8 hr |
| Sep 5, 3:56 PM CDT | Severe Thunderstorm Watch | SPC | Alfalfa, Blaine, Custer, Dewey, Ellis, Garfield and 7 more | 7 hr |
| Sep 5, 6:53 PM CDT | Mesoscale Discussion | SPC | Alfalfa, Beaver, Beckham, Blaine, Caddo, Canadian and 16 more | 67 min |
Nearby
Mesoscale Discussions in Texas, 2012Mesoscale Discussions in Oklahoma, 2012Every mesoscale discussion in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.